Forget the haters. Its your work. Make it the way
The title says it all. Just because its not entirely "Halo" doesn't mean its bad. What it means is that is original, and originality is a great thing the have.
On to the review. First, the story. I have read the Halo books, so I know the true story of the Spartans. But compared to this, I like your story way better. Unlike the action-packed gun hoe that is the Master Chief (don't take that the wrong way. I like him as much as the next guy), your Spartans face a more difficult challange. Not only are they stranded without help, but they have to deal with the memories of their families. Master Chief doesn't need to worry. He forgot his family a long time ago. Its this emotional blow that I like. Second, the graphics. Absolutly top-notch. You put alot of detail into each Spartan. The addition of the Halo 3 Spartan armor (the one with the bigger orange faceplate) was welcome. Next is the sound. The msic really suited the mood of the movie. I didn't mind the voice actors, but the quality of the voices could use some work. Some were liud, others were soft. Fix this and you should be good to go.
Since I'm getting serios typers cramp fro leaving this review, I'll end here. Overall, you have nothing to worry about. Stick with your own ideas. This is Newgrounds after all. Its a place to freely express your ideas. Don't let all these mad Halo fans let you down.
Now pardon me while I go get the feeling back in my fingers (ow).
~TwinGemini~